Spine— Cervical 7 Dorsal 12 Lumbar 5 Coccygeal 1 Sacral 1 —— 26 26 Cranium 8 Face 14 Hyoid 1 Sternum 1 Ribs— True 7 Pair False 3 “ Floating 2 “ ——————— 12 “ 24 Upper Extremities 64 Lower Extremities 62 ——— 200 In the above outline the bones of the ear and the sesamoid bones are not considered. Different anatomists make different computations as to the number of bones in the skeleton. Some authorities add the bones of the ear, thus making 206 in all. If all the little sesamoid bones were added, the number could be greatly augmented. =The Vertebral or Spinal Column. (The Spine).=—The spine is a flexuous and flexible column formed of a series of bones called vertebrae. There are twenty-six in number and may be divided as follows: Cervical 7 bones Dorsal 12 “ Lumbar 5 “ Sacral 1 “ Coccygeal 1 “ [Illustration: FIG. 13—The Spine.] The cervical vertebrae are smaller than those in any other region of the spine, and may be readily distinguished as they lie in the neck and extend from the base of the skull to the dorsal vertebrae, or the point of attachment of the first rib to the first dorsal. The dorsal or thoracic vertebrae are the next in rotation down the spine and are intermediate in size between those in the cervical and those in the lumbar region, and increase in size from above downward. The lumbar vertebrae, the next in rotation, are the largest of the vertebral column and can be distinguished as those lying in the lumbar region or the small of the back. The sacrum, meaning sacred, so called, because it was the part selected in sacrifices. The sacrum is a large triangular bone, situated at the lower part of the vertebral column, and at the upper and back part of the pelvic cavity. The coccyx, so called from having been compared to a cuckoo's beak. It is usually formed of four small segments of bones, and gradually diminish in size from above downward, and blend together so as to form a single bone. The spinal column is situated in the median line, at the posterior part of the trunk. Its average length is about two feet, two or three inches. The female spine is about one inch shorter than the male. The spinal canal in which runs the spinal cord, follows the different curves of the spine; the opening being the largest in those regions in which the spine enjoys the greatest freedom of movement, and the smallest where motion is more limited.